Subject

Biology

Class

CBSE Class 12

Pre Boards

Practice to excel and get familiar with the paper pattern and the type of questions. Check you answers with answer keys provided.

Sample Papers

Download the PDF Sample Papers Free for off line practice and view the Solutions online.
Advertisement

 Multiple Choice QuestionsShort Answer Type

1.

Name the part of the flower which the tassels of the corn-cob represent.

2300 Views

2.

Mention any two contrasting traits with respect to seeds in pea plant that were studied by Mendel.

452 Views

3.

Why is secondary immune response more intense than the primary immune response in human?

639 Views

4.

Why is it not possible for an alien DNA to become part of a chromosome anywhere along its length and replicate normally?

823 Views

Advertisement
5.

State the role of C-peptide in human insulin.

909 Views

Advertisement

6.

Name the enzymes that are used for the isolation of DNA from bacterial and fungal cells for recombinant DNA technology.


The enzymes that are used for the isolation of DNA from bacterial and fungal cells for recombinant DNA technology are:

Lysozyme is used to isolate DNA from bacteria.

Chitinase is used to isolate DNA from fungus.

570 Views

Advertisement
7.

State Gause's Competitive Exclusion Principle.

838 Views

8.

Name the type of association that the genus Glomus exhibits with higher plants.

621 Views

Advertisement
9.

Why are the human testes located outside the abdominal cavity? Name the pouch in which they are present.

666 Views

10.

In Snapdragon, A cross between true breeding red flower (RR) plants and true breeding white flower (rr) plants showed a Progeny of plants with all pink flowers.

(a)The appearance of pink flowers is not known as blending. Why?(b)What is the phenomenon known as?

1154 Views

Advertisement